15-Letter Words Matching _____N__O______

There are 18 15-letter words that match _____N__O______. 5 are common words, such as CONTENTIOUSNESS and CONVENTIONALITY. A rarer one is TRYPANOSOMIASES. In this set, I is the most frequent open letter (17 words). 9 words contain a doubled letter.

Full list 18

contentiousnessconventionalityconventionalizepretentiousnesstendentiousnesscompendiousnessconventionalismconventionalistmagnanimousnessperfunctorinesssententiousnesstrypanosomiasischolangiographycombinatoriallyhelminthologiesnoncontrollablesporangiophorestrypanosomiases

About this list

Words
18 (5 common words)
Common example
contentiousness
Rare example
trypanosomiases
Doubled letters
9
Ending in S
11
Most frequent letter
I (17)

Questions

How many 15-letter words matching _____n__o______ are there?

18. 5 of them are common words.

What is a common example?

CONTENTIOUSNESS is among the common words in this set.